/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemComponent.h
Will be called from GiveAbility or from OnRep. Initializes events (triggers and inputs) with the given ability
virtual void OnGiveAbility ( [FGameplayAbilitySpec](API\Plugins\GameplayAbilities\FGameplayAbilitySpec) & AbilitySpec )